Basking shark vs Brook Floater

Rhincodon typus compared with Alasmidonta varicosa

Key Differences

• Basking shark is Endangered while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Basking shark	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Chondrichthyes (Cartilaginous Fish)	Bivalvia (Bivalvia)
Order	Lamniformes (Mackerel Sharks)	Unionida (Unionida)
Family	Rhincodontidae (Whale Sharks)	Unionidae
Genus	Rhincodon (Whale Sharks)	Alasmidonta
Species	Rhincodon typus	Alasmidonta varicosa

Evolutionary Relationship

Basking shark and Brook Floater share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Basking shark

EN — Endangered

Trend: Decreasing ↓

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Basking shark	Brook Floater
Diet	Omnivore	—
Average Lifespan	100 years	—
Average Length	12.0 m	—
Average Weight	20.0 t	—

Habitat & Geographic Range

Basking shark

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Distributed across Chile, Portugal, Taiwan, and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Brook Floater

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Basking shark

The world's largest fish, whale sharks can exceed 12 meters and 20 tonnes, inhabiting tropical and warm temperate oceans worldwide. Despite their massive size, they are harmless filter feeders, consuming plankton, fish eggs, and small fish by swimming open-mouthed through prey-dense water. They undertake vast seasonal migrations following plankton blooms. Endangered due to fishing, boat strikes, and the live fin trade, with population declining by approximately 50% over the past 75 years.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.